DjVu is a web-centric format for distributing documents and images. DjVu was created at AT&T Labs-Research and later sold to LizardTech Inc. DjVuLibre is a GPL implementation of DjVu maintained by the original inventors of DjVu.

Free editor for PDF documents. Complete editing of PDF documents is possible with PDFedit. You can change raw pdf objects (for advanced users) or use many gui functions. Functionality can be easily extended using a scripting language (ECMAScript).

uGet, the Best Download Manager for Linux.
uGet is an Open Source download manager application for GNU/Linux developed with GTK+, which also comes packaged as a portable Windows app.
uGet uses very few resources while at the same time packs an unparalleled powerful feature set. These features include a Queue, Pause/Resume, Multi-Connection (with adaptive segment management), Mirrors (multi-source), Multi-Protocol, Advanced Categorization, Clipboard Monitor, Batch Downloads, Individualized Category Default Settings, Speed Limiting, Total Active Downloads Control, and so much more!
For the full Features list go to http://ugetdm.com/features
- Quick Links -
Blog: http://ugetdm.com/blog
Support Forum: http://ugetdm.com/forum
Tutorials: http://ugetdm.com/tutorials
RSS Feeds: http://ugetdm.com/rss
Gallery: http://ugetdm.com/gallery
Frequently Asked Questions (FAQs): http://ugetdm.com/faqs

xVideoServiceThief is a tool for downloading your favourite video clips from a lot of video websites. xVideoServiceThief also provide you the ability to convert each video in most popular formats: AVI, MPEG1, MPEG2, WMV, MP4, 3GP, MP3 file formats.